Sand-blast nozzle



HAZAM 2 Sheets-Sheet l R. G. COEUERN SAND BLAST NOZZLE Filed March 3o, 1918 R. G. COBURN SAND BLAST NOZZLE' 42 sheets-sheet 2 Filed March 50, 1918 for example, vwhich have never been obtained by any other form of sand blast nozzle so far as my knowl e is concerned.

- The nozzle as a whole may e supported in.-

any Adesirable way, but is preferably .mounted in a detachable. manner so as to charge member 4 so that the'latter may bev moved rearwardly and through the opening in which the member 1'0 fits, to permit sai member 4 tol be removed and replaced by another one. The replacement of the nozzle 4 is necessary because ofwear by the sand, as well known in this The member 10 providing the nozzle9 is preferably formed as part ofa cross memr 19 which is secured to the hollow member or casing 7 by means of bolts 18. Thus the-member 10 ma be secured firmly in position by means of t e bolts 18 and then the air inlet tube may be held in proper position by screwing the threaded portion l6- into the correspondingly threaded socket at the rear of said member 10, which screwing action may readily be done by means ofthe nut 15 on air tube. To remove the various parts the air tube may be unscrewed so as to withdraw its .threaded end 16 from the member 10 and then the member 10 may be removed by unloosening the'nuts of the bolts 18 and moving the member 19 so'as to -withdlaw said member 10. lf desired to remove the nozzle 4 also this may be pushed back in its socket and then through the open- 1. The combination of a casing providing a vertically extending mixing chamber, a sand inlet opening into one side of said chamber near the upper end thereof, an air `blast nozzle opening into the same side of said chamber below said sand' inlet and a sand blaat nozzle on the other side of4 said chamber, the intake end of said nozzle be- -v first mentionedl orifice for assistin ing located opposite said air blast' nozzle,

said air blast nozzle having) a main air orilice aligned with the sand last nozzle, and supplemental air orices at the sides of salid 1n t e direction offsandv into saidsand b ast nozzle, said tim mentioned air Aorifice bein relatively lar ces beingrelatively small.

2. .The combination cfa casing providing av vertically extending mixing chamber, a sand inlet .opening into one side of said- .zle, andsuplemental air orifices at the and said -supi)lemental orinavaoia chamber near the upper end thereof, an'air blast nozzle opening into the same side of said chamber below said sand inlet and a sand blastvnozzle on the other side of 'said chamber, the intake end of said nozzle being located opposite said air blast nozzle, sald air blast nozzle. havin a main `air orifice alignedl with the sand #blast nozzle, and supplemental air orifices at the sides of said firstmentioned orilce for assisting in the direction of sand into said sand-blast nozzle, said first mentioned air orifice being relatively largeand said supplemental .orifices being relatively small, and said supplemental orices-being arranged in annular order around said first mentioned orilice and being inclinedso as to converge at a point in front of said first mentioned orifice. .3. The combination of a casing having front and back walls and forming al mixing chamber, asand inlet secured to the upper portion of the rear wall, an air blast nozzle secured to the lower portion of said wall andv pointing into the mixing chamber'and a sand blast nozzle secured to the front wall and having its receiving aperture in line n with saidv air blast nozzle, but separated from the same by space forming a portion of the mixing chambensaid' sand blast noz-` zle having its bore in' substantial axial alignment with 'the bore of said air'blast nozzle, said air' blast nozzle havin a main air orifice aligned with the sand b astnozside. of saidl rst mentioned air oritce for assisting in the direction of sand into the inlet opening fof said sand blast nozzle said supplemental air orifices being arranged in annular order' around 'said main orifice and being relatively smaller than vthe same andinclmed so as to conver y at a point in front .of said main air origce. l d; The combination of a casing providinga mixing chamber, a sand inlet opening in- 110 to said mixing chamber, an air nozzle ar ranged to direct air into said chamber below. the sand inlet, said air nozzle being provided with a. centralrelatively large orlcev and with supplemental relatively small H5.

orifices which latter Vsurround. the main ori tice and are inclined so as to int in front of' the main air inlet anda ischarge nozzle secured to said casing on the side. there-A of opposite said air nozzle and having its borev substantially in alinement with the central air orice n n 5; The combination of a casing provid-' ing a mixing chamber, a sand inlet opening into said mixing chamber, an air nozzle arranged to direct air into said chamber low the vaand inlet, said air nozzle bem rovide'd with a central relatively large orieEcc land with-supplemental relatively small th@ Planilla agi? nce end ere inclined m ne to converet e point in front of the mein eir inlet endv e discharge nozzle dehebly secured to seidl casing on the side thereof opposite seid nir nozzle end hevin its bore substentielly in elinement with i.

e centrel nir orifice, seid eir nozzle being provided by Ae member fitted removnbly into one eide of seid ing, end Iseid diecherging nozzle being removeble from tli'e casing through the opening puced in the cesing by tbe removel of the ein nozzle therefrom.

6. The combinetion of e casing providing e mixin chamber, e send inlet openingI into sein? mixing cllember, en nir noz zle errer.: to direct nir into seid chember below the send inlet, seid nir nozzle being provided with e centrel reletively orice end with 'sup lementel reletive tbe mein orice end ere inclined so ne to converge in front of tlie ein eir iet end e. disclier nozzle detebl secured to seid ing on the side tlnereo opposite enid nir nozzle end heving ite bore eub.

stnntielly in elinement witlrtbe cent eir orice, seid nir nozzle being provid by n member. tted ymrebly' into one side of eeid cesing,l end seid diecherge nozzle being provided with e temi end portion nt y smell orifices, which enter suiz'round tin into e tepering socket in seid eeen., en nemoveble fro seid cen'ng ltliroug e opening fulting m the moved of seid nir nozzle member.

nozzle detehably secured to seid casing on the side thereof op r 1f mid eir nozzle end lieving its bore ovv tentielly in nlinenient with the central air orice, seid nir nozzle being provided by e member'tted removably into one side of seid ceeing, @seid discharge nozzle being removeble from the casing only through the onine which resuits from the ovel o seidL5 nir nozzle met end en oir tube member hnving e wrew threed connection with the neer of seid nir nozzle member. l

ln witn whereof, l hereunto eubeerilre my' neme thin 25th dey'4 el Jennery A. D;

lele. y

n ,time G, @nnte 

